In China, the number 1 is auspicious and symbolizes energy and unity. 4 in Norse mythology represents stability in the cosmos, and 5 in Hebrew is the number of stones David used to defeat Goliath and stands for strength. In Buddhism, the number 8 is the path to enlightenment. In China, ten symbolizes duality since it is the double of five (five represents totality).
Think about numbers and their significance in your life. I played 5 at soccer, 1 at cricket and 10 at rugby. Pick your number.